package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.http.HttpMessageConverters;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Slf4j
@Service
public class UserServiceImpl implements UserService {

    //微信服务接口地址
    public static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private HttpMessageConverters messageConverters;

    @Autowired
    private UserMapper userMapper;

    /*微信登录*/
    @Override
    public User wxLongin(UserLoginDTO userLoginDTO) {

        String openid = getOpenid(userLoginDTO.getCode());
        //判断openid是否为空，如果为空表示登录失败，抛出业务异常
        if(openid==null){
            throw  new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断当前用户是否为新用户
        User user = userMapper.getByOpenid(openid);

        //如果是新用户
        if(user==null){
            user = user.builder().openid(openid).createTime(LocalDateTime.now()).build();
            userMapper.insert(user);
        }

        return user;
    }

    /*
    * 调用微信接口服务，获取微信用户的openid
    * */
    private String getOpenid(String code){
        //调用微信接口服务，获得当前微信用户的openid
        Map<String, String> Map =new HashMap<>();
        Map.put("appid",weChatProperties.getAppid());
        Map.put("secret",weChatProperties.getSecret());
        Map.put("grant_type","authorization_code");
        Map.put("js_code",code);
        String json= HttpClientUtil.doGet(WX_LOGIN, Map);

        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
